Tagged Questions

In computer networking, network address translation (NAT) is the process of modifying network address information in datagram (IP) packet headers while in transit across a traffic routing device for the purpose of remapping one IP address space into another.

My network topology is pretty basic. My data center provides a router and added a switch just before my cage to provide connectivity to all of the racks. My rack takes the copper drop they provide and ...

I am trying to configure a Cisco ASA5505. I am using the GUI start up wizard. When I assign the outside IP address to be a public IP address the configuration will work but after about 30 seconds the ...

I'm trying to use iptables counters with munin to monitor traffic of hosts on my local subnet. For each host I set up a rule like this:
iptables -I OUTPUT -d $ip
This should count the packets going ...

I have a LTSP subnet (192.168.0.0/24) and want to disable NAT for every client except one client
The purpose is to deny (on demand) access to internet from student clients, but always allow it from ...

I need to allow traffic from any IP to a specific port in an ASA 5505 using ASDM 7.1.
I've already created an Access Rule to do this but I ran a Packet Tracer and it gets dropped due to an "implicit ...

I am not allowed to run my VMWare guest in bridged mode, and I want to somehow tunnel from an agreed port on the Mac's external network interface to the webserver running on the VMWare fusion guest.
...

I have a linux server with 2 WAN connections. It has 2 public IP address as WAN_IP1 and WAN_IP2. The server default gateway is WAN_IP1.
The server also has 2 LAN interfaces and the relative subnets.
...

I'm trying to secure my home network but don't really need the complexity of a VPN so I'm trying to figure out other options.
I'd like to allow my iPhone remote access to my home servers but I can't ...

There is a Debian Wheezy box with OpenVZ kernel (IP 1.1.1.1), working as router between Internet and VPS'es (IPs 1.1.1.100 and 1.1.1.200).
Incoming packets addressed directly to VPS'es are normally ...

Running a DHCP server, client(s) does not have up-link (0Mbps) and has a downlink (50Mbps.)
I am setting up a gateway/router on a PC running Debian Wheezy with ISC-DHCP. I have 1 WAN (eth0) and 2 LAN ...

I've asked this question and even searched around but didn't get a useful answer for me.
Basically what im doing is i have a webserver on internal ip 192.168.0.100 port 80. So if im in the network it ...

I obviously have some knowledge gaps in routing maybe you can help me:
My ISP has given me 8 external IPs but I have to route them myself. The first IP is issued via DHCP and the other 7 are fixed.
...

I'm trying to get my head wrap around this issue...
I would like to connect two users...
Those users are already connected to a TCP server, which is aware of both public ip and connection TCP port.
...

When my cellphone accesses a website via the tower and its GPRS gateway, NAT ensures that the sites receive a public IP. Would all phones using a single tower have the same IP?
If yes, then how can ...

We are using NAT made with iptables. However when there are lots of connections (or sessions) through NAT server packages start to drop. There is no log in syslog etc. I think this is caused by sysctl ...

I have a domain name, let's say foo.com. I have a server which has a public IP (Server-A). I also have a lot of servers (Server-B, Server-C, Server-D etc) which are all connected in a private network ...